Hot water heater



2 Sheets-Sheet l Filed Nov. 22, 1939 INVENTOR Sepheh N. Bobo Dec. 31,1940.` s. N. BOB@ 2,227,293

HOT WATER HEATER Filed Nov. 22, 1939 2 Sheets-Sheet 2 I NvEN-roR SfephenN. Bobo ORNEY Patented Dec. 3l, i940 t l UNI-Teo stares PATENTorrillc-i:

I-iOT-VVATER HEATER t Stephen N. Bobo, New York, N. Y.assignor to RobertP. Sniifen, New York; N. Y.

ApplicationtNovember 22,- 1939; SeriaLNo: 305,601

2 Claims. (Cl. 122-.-250) My present invention relates to Water heaters,Fig., 2 isla sectionalview -on the line 2-2 of andmore particularly toan improved waterheater iFig. l, looking in the direction of the arrows,of the instantaneous type. and

In myimproved heater I divide the heatingcoils i Fig. Suis a perspectiveView of the ceramiceleinto two sections or zones arranged one above mentassembly ofthe burner shown in section in the other, and pass the waterto be heated through Fig; l, and iii-plan View in Fig; 2. theeoils inseries and with the lowermost-coil :Referring to thedrawings, ldesignatesacassection subjected to direct heat from aiburner, ing ofanysuitableform;butpreferably cylindrical, and` with the uppermostcoilsection subjected lprovidedai/ith a bottom Ii and with atop I2. `The tothe action of indirectly applied heat. The -casing Ii) rests on asupporting frame |3,Ysolcon 10 uppermost coil section is arranged as thecold AStructedas-to permita free circulation of air be- Water receivingcoil section, and `therefore such .DeathltheteaSDg JU. The-top l2SDYOVd-ed With water is preheated to aconsiderable degree before leeesdseherge Ofiee l It, through Which-the Waste entering-the lowerrnostcoilrsection. The coil secor Spent gases `of combustion `may pass into#the 1;, tiensare arranged in frustro-conical form, and openiairyorintoa suitable chimney.

with theilarger ends adjacent eachother, thereby 4At the u:tOpof thecasing lil and extending formingl a cavity inwhich is arranged theactual thleugh the material theY-eef -S` im inlet nipple burner. Theburner is so constructed asito direct 115, Seeufed ih. DOStOh hythe mit-15- This nipt a radial heat downwardly upon theinteriorof the ple i5,asisousual, is threaded as shown to facilie201' loweiinost coil sectionand the burner is arranged "tete COImeetOIl t0 a; Seuee 0f lVlfatelSupply 20 with perforationswhichwill permit the heat to Wthh the hter'er0fthe Casing Hl the nipple Us@ upwardly |51isprovidedwith-,twointernally threaded p0r- The Cgi] sectionsv and burner are .a1-rangedtions? leand lwespectlvelyfalld the interior 0f within a. suitablecasing'which may be cylindrical `Sl1e`r1p0rt0ns Communicatelwth theinterior of or rectangular. Extending inwardly from the the nipple-l5Seellledlor'attaCheCl-tethe-Dertieny25 inner surface of the casing. arebaffle plates which 7, hyA threading 01" `SWett ttngi 01" the like, iSallow the yheated gases tolaccuinulate and move a tubular member 19.TllisrnernloeriHiv-isforrned upwardly in the casing relative to the coilsections integra-1 With e -COil 2li OImeigenerally ih the t0 a dischargeorice, `form of a` frust'rum of la cone, andwhich at its v30 `A featureof my invention therefore is an imlower end is provided withtaunion 2|.4Securedo proved hot `Water heater ofthe instantaneous Ol ataehed t0the. pOTtOn 43 inehy Suitable typg manner .is a :tubularmember 22 whichis formed A further feature of my invention is an improved integraliwith A.a `coil '23 formed generally ih the `instantaneouswater heater inwhich the water `ehehe Of -the fruStlllm Of-a C0r1e and Which,aScontaining coils are constructed in frustro-conica1 shown in Fie. 1,4encloses the C0111 2e- The lower 35 form and are assembled to define acentral charnend 0f this COl 23 iS located `ffhetlleally OPPO- ber inwhich is located the burner e1ements gsite thelcwerend of the colli()andinas secured A still further feature of my invention is an ftheret aur1l0n124. improved instantaneous Water heater in which the Y.Theeelsiliahd 23,Y are in general in the form 40 Water is preheated priorto being brought into w0f.,a 1frustr,um of `a conaand one nested Withhwfposition to be heated by direct radiation from the theothenand occupy aspace substantiallyequal heating element. to one-halfl the height ofthe.casing I0.

`A stili further feature of my invention is an Adjacent the lower end 0fthe vcasina le is a instantaneous water heater in which the coils are4tlellelee nipple '25 YWhich Vpasses thlOllgh the arranged in sectionsand in which the water is Wall 0f tlleyefillllg` lll andissecured inposition .45 fed into the uppermost section to be preheated by thenlltl- This nipple 25 has tWO pOrtiOIlS and then downwardly into theloWermost coil to 2'l-elel 23 TeSDeCtVely, the ihtelOf OffWhtCh 00mbeheated to theI required degree. municate with the interior ofgthe,outlet nipple Other features of the invention and novel con- 25.Secured t0 the portion 2T is a' tubular memstructions of apparatusembodying the same will lliclgg2l` Which iS integral With and forms apart 0f50 appear as the description of the invention profaiCOiliilffeimed, generally inthe ferm` of.;a gresses. l i, frustrum cfacone,\and which is located with its In the,-accompanyingdrawings Ilargerend Auppermost. yAt the end of the coil Fig. 1 is a vertical section,partly in elevation, :30 is secured a threaded member 3| which co-;,5'51 through a heater embodyingmywinvention. 1 operates with thelinien 2| to makea water-tight @'55 in position on the plate 35 by nuts3B.

connection between the coil 23 and the coil 30 so that there is a watertight path from the inlet nipple I5 through the coils 23 and 20 and outthrough the discharge nipple 25.

Secured to the portion 28 is a tubular member 32 which is formedintegral with and forms the part of a coil 33 formed generally in thefrustroconical form, and located within the coil 3l) and with its largerend uppermost. 'Ihe upper end of the coil 33 has secured thereto anexternally threaded member 34 which cooperates with the union 24 to forma water-tight connection between the coil 20 and the coil 33. Thus thereis provided a water-tight path from the supply nipple l5 through thecoils 20 and 33 and out through the discharge nipple 25. The upper endof the coils 30 and 33 are, as shown, spaced apart from the lower end ofthe coils 20 and 23 and, therefore, there is provided a relatively largespace between the two sets of coils in which may be housed the burner tobe hereinafter described.

Mounted on the upper ends of the coils 3l] and 33 adjacent to theexternally threaded members `3| and 34 is an annular plate ring 35. Theinner diameter of the plate ring 35 is stepped, :as indicated at 36, toprovide a seat or shelf for a burner to vbe hereinafter described.Extending upwardly from the annular stepped plate 35, and preferablysymmetrically arranged about said plate, are standards on posts 31.These posts are secured The posts 31 are so formed as to followgenerally the outer conical contour of the coil 23. Such posts also arethreaded at their upper ends and pass through perforations in a bailleplate 39, such baille plate 39 being secured in position on the posts 31by means of the nuts 40.

K The baille 39 is provided with perforations to permit escape of spentgases of combustion, and also is provided with a centrally arrangedperforation through which extends a threaded screw 4l. To the lower endof the screw 4| is screwed a burner 42. This burner cooperaltes withi aceramic assembly designated generally by the reference numeral 43 andwhich preferably and for convenience in manufacture and assembly iscomposed of a plurality of sectors 44.

The sectors 44 when assembled in the unit 43 define a central passageway45 and a seat on the lower face against which the upper end of theburner 42 seats and engages. Also the lower peripheral face of thesectors 44 seat in the step 36 formed in the annular stepped plate 35.Further, on the lower face of the sectors 44 are arranged the closelypacked downwardly extending points 46. The sectors 44 are composed ofheat resisting non-combustible material of any suitable ceramic materialand in operation the downwardly extending points become incandescent andradiate heat generally downward over the entire area of the burner 43.The sectors 44 are also provided with perforations 41 eX- tendingthrough the same and preferably equal in number to the number of points45. These perforations 41 permit heated gases to pass upwardly throughthe burner elements and into engagement with the coils 20 and 23 in theupper half of the casing I0.

The lower bottom Il of the casing IE) is centrally perforated to permitthe attachment thereto of the lower end 48 of a gas tuyre 49. The upperend of the gas tuyre 49 is connected by means of screws 50 with thelower entrance end of the' burner 42. The lower end 48 of the tuyre isprovided with a perforated diaphragm 5l on which is rotatably mounted aperforated cover 52, and which may be rotated through any desired angleto control the flow of air into the casing connecting member 49. Gaseousfuel is fed to the tuyre 49, and thence to the burner 42 from a sourceof supply through the feed pipe 53 and nipple 54.

Within the casing l0 and surrounding the sets of coils above referred toare bailie plates 55, 56 etc. These baille plates are secured at theirouter periphery to the inner surface of the casing I0, and theirperiphery is only slightly larger in diameter than that portion of thecoils 23 and 30 with which such plates are adjacent. In this mannerthere is provided a series of baffles for each of the coils 23 and 30and which permit the heated air or gases to flow upwardly but alwaysclosely adjacent to the coils 23 and 30, which thereby are assured ofbeing brought into contact with as great an amount of heated gas orproducts of combustion as possible.

When constructed and assembled as above de scribed and with the supplynipple l5 connected to the source of water supply and with the dischargenipple 25 connected to the suitable discharge fixtures water may beturned into the Sets of coils. The Water ows through the individualelements 2l), 23 and 30, 33 of the sets of coils, in parallel. Ifgaseous fuel is turned into the burner 42 and ignited the flame from thegaseous fuel will bring the points 46 of the burner elements 44 toncandescence and the heat generated will be directed downwardly intoengagement with the coils 30 and 33. The water in such coils will beheated and upon proper manipulation of the apparatus at the dischargefixtures water will ow downwardly through the set of coils 2U and 23 anddownwardly through the set of coils 30 and 33 and out through thedischarge nipple 25. The heat generated by the burner 42 will, afterbeing directed downwardly as above described, naturally rise and will,because of the discs 56 be held in close association with the coils 30and 33. Also the heated gases will ow upwardly through the perforations41 and the heated and practically waste products of combustion will bebrought into engagement with the set of coils 20 and 23. The waterflowing through the sets of coils therefore will be heated in adirection opposite to the direction of ow, so that the water lyingwithin the coils 20 and 23 will be preheated before such water passesinto the zone of direct heat by means of the burner 42 and ceramicassembly 43.

Whereas I have described my invention by reference to specific formsthereof, it will be understood that many changes and modifications maybe made without departing from the spirit of the invention.

I claim:

l. In an improved hot Water heater of the instantaneous type, thecombination of a tubular heating element comprised of independentsections, each section of frustro-conical form, and arranged with thelargest ends thereof adjacent to each other, said tubular sectionsarranged one above the other, and designed to havethe water to be heatedpassing from the uppermost section to the lowermost section, thepositioning of the Sectio-ns defining a centrally arranged chamber, a

burner within said chamber, and adapted to direct heat generated therebydirectly downward onto the lowermost coil section, and means fordirecting the waste heat upwardly into engagement with the uppermostsection.

2. In a hot water heater of the instantaneous type, the combination of acasing, a tubular coil heater located within the casing and comprisedessentially of two sectionsan upped and a lower section-each sectionbeing of substantially frustro-conical form, and with the ends thereofof greater dimension arranged adjacent to each other to thus define asubstantially centrally located chamber, a water inlet at the smallerend of the uppermost heating coil, a discharge outlet at the lowermostend of the lowerly arranged coil, a burner located in said chamber, thesaid burner so arranged as to direct heat directly downwardly intoassociation with the lowermost coil section, and means secured to thecasing for directing heat upwardly into association with the uppermostcoil section.

STEPHEN N. BOBO.

